Are you a property professional?Get qualified leads from motivated homeowners.
Get startedAre you a property professional?Get qualified leads from motivated homeowners.
Get started11 Northwick Avenue is a semi-detached house in Harrow (HA3 0AA). It has a recorded floor area of 170 m² (around 1830 sq ft), construction records dating it to 1900-1929 and council tax band E. The latest certificate (June 2018) shows a C (score 69), just inside the C band. The recommended improvements would push it to B (score 83).
At 170 m² the property is well over the postcode median (91 m² across 27 EPCs), placing it in the larger end of the local stock. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension and a loft conversion, meaningful when judging how the property has evolved.
Planning history includes both a loft conversion and an extension — the classic family-home expansion.
Extension: Single storey · Rear of property
Erection of single storey rear extension and alterations to roof of existing single storey rear extension to dwellinghouse
11 Northwick Avenue has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£845,000
Modelled from EPC, postcode comparables.
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
11 Northwick Avenue outperforms the street on epc rating by a wide margin.
EPC Rating
69 (C)
Street avg 58 (D)
Floor Area
170 m²
Street avg 151 m²
CO₂ Emissions
5.5 t/year
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Northwick Park Station — bus stop.

Daytime· 07:00 – 23:00
51.3dB

Certificate of lawfulness for proposed hip to gable end roof extension, a rear dormer with 2 front rooflights to dwellinghouse
Median price across the last 5 sales in HA3 0AA: £695,000 (2024–2016).
An AI-written breakdown of everything that matters
Detailed EPC data
Full energy ratings, history and recommendations
Related properties
Comparable homes and street-level pricing
Full planning history
Every application and decision on record
Ad-free · Instant access · Secure Stripe checkout · One-off payment
Street avg 6.9 t/year
Habitable Rooms
5 rooms
Street avg 6 rooms
HA3 0DX
Closest school
0.5 km
Harrow High School. 39 schools nearby.
Night-time· 23:00 – 07:00
42.0dB